Author Question: Outline a simple model of planet building. What will be an ideal ... (Read 19 times)

Metfan725 · **on:** Jul 27, 2018

Outline a simple model of planet building.

What will be an ideal response?

Question 2

Stars are born from the interstellar medium, and aging or dying stars return gas and dust back into the interstellar medium.

a. True
b. False
Indicate whether the statement is true or false

lorealeza77 · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

Planetary development in the solar nebula began with the formation of dust grains by condensation. A particle grows by condensation when it adds matter one atom or one molecule at a time, producing a larger body called a planetesimal that contains both rock and metal. A planet grows from accretion and collision of the uniform planetesimals, resulting planet is of homogenous composition. Heat from radioactive decay and planetesimal in-fall causes differentiation, resulting planet has a metal core and low-density crust.

Answer to Question 2

True